c# – 用逗号分隔的连接字典键

我正在寻找一种更好的方法来连接字典键,这就是我现在正在做的事情：

Dictionary<int,string> myList = new Dictionary<int,string>();

myList.Add(1,"value");
myList.Add(2,"value");
myList.Add(3,"value");
myList.Add(4,"value");

string choices = "";

foreach (int key in myList.Keys)
{
    choices += key + " ";
}

choices = "(" + choices.Trim().Replace(" ",",") + ")"; // (1,2,3,4)

我确定有更好的方法,LINQ可能吗？

解决方法

string.Format("({0})",string.Join(",myList.Keys));